Drilling-machine



" W-.;-P. NORTON'. DRILLING MACHINE.

4 sheets-Sheet 1.

NUL-528 Arromvrfys. l

@mi WITNESS vS.,-

(No Mnui.)

W.'1 NORTON.

DRIL'LING MACHINE.

Patentedot. 80, 1894.

Arromvsrs: i

culs PETERS co, Pncmxumo.. wAs Maron. n. c.

UNITED STATES PATENT Enron.

DRILLlNc.-

MACHINE.

SPECIFICATION forming part f Lettefs Patent No.52's,'3s1, dated october so, 1894.

Application iiled April 22, 1893. SerialvNo. 47L391- (N0 11105610 To all whom t may concern:

Be it k nown that LWENDELL PHILLIPS Noa- TON, of Torrington, in the county of Litchfield and State of Connecticut, have `invented a new and Improved Drilling-Machine, of which the following is a full, clear and exact description.

The object of the invention is to providea new and improved drilling machine which is simple and durable in construction, very effective in operation, adapted for use as a single or duplex drilling machine and more especially designed for drilling and reaming lathe spindles, billets, ingots, bars and other bodies requiring a comparatively long but straight and true hole throughout their length.

The invention consists principally of a hinged work-supporting-head adapted to swing in or out of alignment with the drill or drills, thev said head carrying a revolublev section of the same on the line 4-4 of Fig. 3.

Fig. 5 is a similar view ofthe same on the line 5--5 of Fig. 3. Fig. 6 is an enlarged sectional plan view of part of the tripping device for the feed mechanism. Fig. 7 is a cross section of the same. Fig. 8 is an enlarged side elevation of the box foronc of the shafts for the tripping device. of the same on the line 9-9 of Fig. 8. Fig. 10 is a transverse section of the same on the line 10-10 of Fig. 9. Fig. 1l is an enlarged side elevation of one of the studs for the tripping device. Fig. 12 is a cross section of the same on the line 12-12 of Fig. 11. Fig. 13 is an enlarged sectional side elevation of the Worksupporting head; and Fig. 14 is a transverse section of part of the same, the chuck head being removed.

Fig.'.9 is a sectionalplan View As illustrated in the drawings, the machine vis arranged as a duplex machine with two drills in alignment with each other, and fed toward each other to bore `or rearn the article from both ends, but the machine may be made v with a single drill for boring the article through from one endonly. f

The drilling machine is provided with a suitably-constructed frame A on the ends of which are secured the tool heads B, B', in which are mounted to slide longitudinally, the slides C, C', respectively, carrying yat their opposite ends, thedrillsD and D', adapted to engage the body or article E to be drilled from both ends, it being vunderstoodthat the drills and slides are in alignment with each other. The body or article E is revolved and supported in a Work-supporting head F hinged on the main driving shaft G for the machine, the said driving shaft being journaled in suitable bearings arranged on the main frame A (see Fig. 3), the said shaft carrying the usual cone pulleys G connected by a belt with pulleys ou a counter-shaft for imparting a rotary motion to the said shaft G. The drills D and D', before entering the body E pass through and are guided in the drill guides or standards H erected on the frame A on opposite sides of the work-supporting head F.

The work-supporting head F, shown in detail in Fig. 13, is provided with a frame F' hinged on the shaft G and formed in its forward end with suitable bearings for a chuck head F2, mounted to revolve in the said frame and carrying on its ends, chucks F3 of any approved construction, for securing the work E in place in the said chuck head. The chuck head F2 is formed` at its middle between the bearings of the frame F with a gear wheel F4 in mesh with a'pinion Fise- 'cured on the main driving shaft G, so that when the latter is rotated the said pinion F5 imparts a rotary motion tothe gear wheel F4, whereby the chuck head F2 and the work held therein are rotated at the desired rate of speed.

The free end of the frame F' rests on a suitable offset A' on the main frame A, (see Fig. 14,) and this free end is adapted to be locked in place by means of bolts F6, pivoted on the said offset A' and engaging slots in IOD the free end of the frame F'. (See Figs. l and 14.) When the nuts of the bolts F6 are loosened the said bolts can be swung downward to unlock the frame F', to permit of swinging the latter upward and rearward out of alignment with the drills D, D', to permit of conveniently removing the drilled body or article and to insert anotherone to be drilled. In order to conveniently swing the head F upward and support it in such a position, I connect the free end of the frame F' with a chain F7 connected with a suitable hoisting mechanism located overhead. Now, by manipulating this hoisting mechanism, the head F can be swung upward and supported in this position for the purpose above described. After a new body is inserted the head is again permitted to swing downward into its normal position and then locked in place by the bolts FG to hold the work in alignment with the drills D and D'. The latter, as well as the slide C' supporting the drills, do not revolve, but have a longitudinal sliding motion, eachof the slides C or C being provided for this purpose at the under side with a rack C2, fitting into a correspondingly longitudinally-extending groove in the respective tool head B or B. The mechanism for imparting a feed movement to the tool heads C and C and the drills D, D','car ried thereby, are alike in con struction, so that it suffices to describe but one. Each of the racks C2 is in mesh with a pinion C3 secured on a transversely-extending shaft C4 mounted to turnin suitable bearings in the main frame A directly under the tool head B or B. One outer end of this shaft C4 carries a gear wheel 5, (see Figs. l, 3 and 5,) in mesh with a pinion C5 secured on the rear end of a transverselyextending shaft C7 also journaled in the main frame A under the respective tool head B or B'. On the rear end of this shaft C7 is secured a worm wheel C8 and on the front end of the said shaft is secured a four-armed handle C9 to enable the operator to impart a feed motion to the respective slide C or C', by hand, whenever desired. The worm wheel C8, however, is connected with and driven from the main driving shaft G, and for this purpose, the said worm wheel meshes into a worm I secured on a longitudinally-extending shaft I' connected by a universal joint I2 with short shaft I3 journaled in suitable bearings on the main frame A parallel to the main driving shaft G. On this shaft I3 is secured a small gear wheel I4 in mesh with a pinion I5 mounted to rotate on a stud I6, held adjustably in a bracket projecting from the main frame A, (see Fig. 3,) and this pinion I5 carries on its inner face, a gear wheel 17in mesh with a gear wheel I8, held on the main driving shaft G. Thus, when the latter is rotated, the said gear wheel l8 rotates the gear wheel I7, which rotates the pinion I5, and the latter drives the gear wheel I4 thus imparting a rotary motion to the shaft I3, which, by the universal joint I2, revolves the worm shaft I', so that the worm I rotates the worm wheel C and the latter transmits its rotary motion by the pinion C, to the gear wheel C5, held on the shaft C4, which, by the pinion O3, engaging the rack C2, impart-s a sliding motion to the corresponding slide C or C'. By this arrangement a longitudinally-forward feed is given to the two drills D and D' simultaneously, so that the lsaid drills enter the body or article E from opposite ends, and as the said body is revolved, the aperture is drilled therein.

Now, in order to automatically stop the feed of one of the drills D or D', previous to the two drills meeting in the middle of the body E, I provide tripping devices arranged as follows: The outer end of the shaft I' is journaled in a journal box J formed at its inner face with a slide J fitted to slide in a guideway J2 hung on pivots J3 and J4, secured to the main frame A, the lower pivot J4r engaging a longitudinal elongated slot in a guideway J2, to permit a slight swinging motion of thelatter from the pivot J3, as a center. The upper end J5 of the slide J' carries a pin J5; (see Figs. S, ll and 12,) formed with a flattened ol set J7 extending into an elongated slot K' formed on a crank arm K, secured on the rear end of a transversely extending shaft K2 mounted to turn in suitable bearings on the main frame A. On the forward end of this shaft K2 is secureda latch lever Ks (see Fig. 2) abutting with its top edge on the under side of a trip lever K5, fulcrumed on the front side of the frame A, as plainly shown in the said Fig. 2. The lower end of the trip lever K5 is adapted to pass into a notch K4 formed on the latch lever K3 at the time a swinging motion is given to the trip lever K5, to permit an upwardswinging of the lever K3 or turning of the shaft K2, and a downward swinging of the crank arm K, caused by the weight of the journal box J and the shaft I journaled therein, it being understood that the latter swings from the universal joint I2, as the center. This movement takes place whenever the lower end of the trip lever Ki moves oii: the top edge of the latch lever K3 and into the notch K4, so that the worm I held on theshaft I' moves out of mesh with the worm wheel C8, thus stopping the feeding of the slide C or C and consequently that of the drill D or D respectively. A swinging motion is given to the trip lever K5 from the respective slide C or C' and for this purpose the upper end K(i of the said lever engages loosely a longitudinally -extending rod K7 provided with an adjustable stop or collar K8, and screwed on a bracket Ko on the rear end ot' the corresponding slide C or C', as plainly shown in Figs. l, 2, 3 and 7. Now, the collar KS is adjusted on the rod K7 a distance from the end K6 of the trip lever K5 to correspond with the distance the drill D or D is to enter the body E, so that when the IOO IIO

respective drill has moved about half-way into the body, its further feed is stopped by the tripping device above described.

When the feed of one of the drills D or D has been stopped by the automatic` tripping` device, as above described, then the other drill is still fed forward to complete the aperture in the body E. As soon as this is done, the respective tripping device of this drill will be actuated, to stop the forward feed of the last drill. The operator then turns the handles C9 so as to move the slides C and C outward to disengage the drills D and D from the body E after which the bolts F6 are `I 5 disengaged from the frame F and the head F is swung upward and the chucks F3 loosened, to permit of removing the drill body E. A new body is then inserted. The head is again swung downward and locked in place, after which the operator swings the latch lever K3 downward to again set the trip lever K5 on the top edge of the said latch lever K3 at the same -time moving the worms I into contact with their worm wheel C8. A forward feed ofl the slides C and C', then again takes place, to cause the drills D and D to enter the revolving body E for boring a longitudinal aperture therein.

In order to feed the necessarylubricant to the forward ends of the drills D and D', I provide each of the latter with a small pipe L terminating near the cutting edge of the drill at the front end thereof, and extending in the twist of the drill along the shank thereof, to finally connect with an oblique aperture formed in the butt end of the drill, and leading to a longitudinal aperture opening into the hollow slide C or C respectively, connected at its outer c nd with a pipe L connected by a iexible pipe L2 with a stationary pipe L3 supported from the main frame Ain suitable brackets, as plainly indicated in Fig. 1. The two pipes-L3 from the two slides connect with a short pipe L4 leading to -the lower end of a cylinder N, of a suitable pump connected with a lubricant supply, and containing a plunger'N pivotally-connected by a pitman N'l2 with a wrist pin N3 held on a crank disk N'secured toashort shaft Njournaled in suitable bearings on the main frame A. (See Figs. 1 and 4.) On this shaft Nis secured a gear Wheel N6 in mesh with a gear wheel N7 held on the main driving shaft G, so that when the latter rotates arotary motion is imparted by the gear wheels N7 and N6, to the shaft N5 which, by the crank disk N4 and pitman Nzvcauses the plunger N to reciprocate and thus pump lubricant through the pipe L4 into the pipes L3. The lubricant passes along these pipes into the flexible pipes L2 and to the pipe L connected with the outer end of the respective slide C or C', through the central bore of which passes the lubricant to the apertures in the drill butts to finally pass into the pipe L and to the cutting edge of the drill in the body E. Thus, as long as the driving shaft is rotating, oil is fed to the drills by the `action of the pump driven from the said main la partition extending from the main frame A.

It will be seen that the feed of either of the slides C and C can be stopped at any time by the operator shifting the trip lever K5 by hand, so that the lower end of the lever drops into the notch K4 to permit an upward swinging of the latch lever K,3 as previously. described,so that the worm WheelIis moved out of contact with its respective worm wheel C8.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 8 5 1. In a drilling machine, the combination of adrill slide having a cog rack and a pinion engaging said rack, with a worm-gear on the transverse shaft of said pinion, anda device for operating said worm-gear consisting of a longitudinal shaft having a corresponding worm-gear, a vertically adjustable journal box for said longitudinal shaft, a supplemental shaft having a crank arm on one end pivotally-connecting said journal box, a latch Y 9 5 lever on the other end, a trip lever for engaging said latch lever, and suitable means connected with the drill slide for tripping said trip lever, for the purpose stated.

2. In a drilling machine, the drill slide havroo ing a parallel rod provided with an `adj ustable stop in combination with a trip lever, loosely engaging said rod, a latch lever engaging said trip lever, a rack and pinion connection for said slide, a crank arm on the x05 crank of said latch lever, a vertically-adj ustable box, pivotally-connected to said crank arm, alongitudinal shaft, having a Worm gear, journaled -in said box, suitable means for operating saidshaft, and a corresponding Worm- 1 1o gear on the rack engaging pinion shaft, for operation in the way described.

3. In a drilling machine, the coinbinatio of the duplex drill slides, each having an operating rack and pinion connection, a worm- I I5 gear on each rack engaging pinion shaft, a longitudinal shaft of jointed sections having a worm-gear, a vertically-adj ustable journal box on the outer ends of said jointed shafts, and suitable means for operating said jointed 1 2o shafts, with trip mechanism connecting said adjustable journal boxes with the drill slides, whereby the movements of the latter toward each other will automatically operate to disengage the said jointed shaft Worm-gear to x25 stop the operation of vthe slides in the way and for the purpose stated.

4. In a drilling machine, a duplex chuck head consisting of a tubular cylindrical body having a chuck at each end, and a circum- 13o ferential driving gear mediately of its ends,

in combination with a bearing for supporting said chuck, duplex drill slides, and mechanism for operating the chuck and the drill 5 slides, substantially as described.

5. In a drilling machine, the combination of the duplex drill slides each having an operating rack and pinion connection, with a duplex work-supporting chuck, ahinged supporting head forming journal bearing for said chuck and means for rotating the latter within said hinged head, substantially as described. t

6. In a drilling machine, the combination of duplex drill slides each having an operating rack and pinion connection, with a duplex work-holding chuck havinga gear Wheel mediately of its chuck heads, a hinged supporting head forminga journal for said chuck and a shaft on which said chuck bearing head is hinged having apinion engaging said chuck gear, substantially as described.

7. In a drilling machine, the combination of duplex drill slides each having an operating rack and pinion connection, witha rotating duplex work-holding chuck and a hinged bearing therefor adapted to be supported in alignment between said drill slides and to be turned over out of the way at the side of the machine, substantially as described for the purpose stated.

8. In a drilling machine, the combination of duplex drill slides with a rotating duplex chuck having an axial bore, a swinging bearing head for said chuck, and a gear on the latter between its heads for rotating said chuck, substantially as described.

9. In a drilling machine, the combination of duplex drill slides, mechanism for connecting them for automatic operation, and a rotating duplex work-holding chuck, with a trip device for connecting and disconnecting the drill slides with their operating mechanism consisting Of transverse shafts each hav- 45 ing a crank arm connecting and engaging and disengaging said operative mechanism, rods on the drill slides each having an adjustable stop, a trip leverpivoted on the frame for each slide rod and a latch lever on each shaft, and mechanism for operating said drill slides by hand whereby both drill slides may be operated together and one of them stopped 'and drawn out from the work while the other continues to operate for the purpose stated. l0. A duplex drilling machine, consisting essentially of two drill slides, a shaft at the back of the machine formed of three jointed sections the two end sections whereof are mounted in vertically adjustable boxes at their outer ends and provided each with a worm-gear, a driving shaft above said jointed shafts and geared to the middle section thereof, a transverse shaft beneath each drill slide having a worm-gear engaging the Wormgear of the jointed shafts and a pinion engaging a rack on the drill slide, a supplemental shaft beneath each drill slide having a crank arm pivotally-connecting said boxes, and a latch lever at its front end, a horizontal rod attached to the outer end of each drill slide, and a trip lever on the frame connecting said rod and latch lever, a swinging head, mounted on the power shaft between the drills, a duplex hollow chuck mounted in said head having a gear mediately of its ends, and a pinion on said power shaft engaging said chuck gear for operation substantially as described.

11. A drilling machine provided with a hinged work-supporting head, comprising a frame mounted to swing on the main driving shaft, a chuck head journaled in the said j frame and carrying chucks at its ends, a gear wheel secured on the said chuck head between the said chucks, and a pinion in mesh with the said gear wheel and secured on the main driving shaft forming the pivot for the said frame, substantially as shown and described.

l2. In a drilling machine, the combination with a driven shaft, a worm shaft carrying a worm, a' universal joint connecting the said worm shaft with the said driven shaft, a journal box for the `outer end of the said worm shaft and formed with a slide, a guideway mounted to swing and engaged by the said slide, a crank arm pivotally-connected with the said journal box, and a tripping mechanism, substantially as described, and connected with the said crank arm, as set forth.

EMMA E. RoRABncK, WILLARD A. RORABAGK. 

